Zhong Zhi, Zhao Xintong and Ren Guanghui
Information Technology Journal 8 ( 7 ): 1076 - 1079 , 2009
Du Yatao, Zhong Zhi, Zhang Hailong, Gong Fang, Ren Guanghui and Lan Shulei
Information Technology Journal 9 ( 6 ): 1251 - 1254 , 2010